Extending shrouding capability of hosting system

ABSTRACT

Technical solutions are described for extending shrouding capability of a virtual server hosting system. An example method includes receiving a request to deploy a shrouded virtual server using a predetermined set of hardware components, and using a shrouded mode. The method also includes adding a guest server to the hosting system, the guest server including the predetermined set of hardware components. The method also includes deploying a preconfigured hypervisor on the guest server, where the preconfigured hypervisor is deployed in an immutable mode that disables changes to security settings of the preconfigured hypervisor. The method also includes deploying, by the preconfigured hypervisor, a preconfigured boot image as an instance of the virtual server on the preconfigured hypervisor. The method also includes sending an identifier of the virtual server for receipt by the client device.

BACKGROUND

The present application relates to computer technology, and morespecifically, to virtual servers.

Cloud computing facilitates a client to provision a virtual serverquickly and easily, without requiring the client to purchase hardware orprovide floor space for a physical server. The client may expand orcontract the virtual server according to changing preference(s). Forexample, the client requests a cloud-computing provider to provision thevirtual server, which is physically resident at the provider'sdatacenter.

With events such as revelations on government agencies, such as NationalSecurity Agency (NSA) of the U.S., spying on data, documents beingreleased by data administrators, clients are wary of security of data inthe virtual server. For example, a client may request that cloudproviders physically host their computing services within the country ofthe client, so as to reduce or avoid the possibility that the cloudcomputing provider, such as a U.S. company is forced, possibly throughsubpoena, to turn over confidential or proprietary documents of thenon-U.S. client to a U.S. government agency.

To comply with such requests, the cloud computing provider, would haveto deploy datacenters in each country it does business in, or in eachcountry that implements a different data protection policy, which wouldbe a costly endeavor. In addition, the client, such as a largecorporation, may maintain copies of data at remote datacenters fordisaster recovery. The distance at which the remote datacenter isphysically located from the local datacenter is limited based on thegeographic size of the country of the client, or the country hostingdatacenters of the cloud-computing provider. Considering that a clientmay prefer to literally have the remote datacenter on a differentcontinent for maximum protection, a small country such as Monaco wouldnot be able to place a remote datacenter far enough away to be protectedfrom a regional disaster that could impact both the primary and disasterrecovery sites.

SUMMARY

According to an embodiment, a computer implemented method for extendingshrouding capability of a virtual server hosting system includesreceiving, by a host manager, a request to deploy a shrouded virtualserver using a predetermined set of hardware components, and using ashrouded mode, the shrouded mode preventing an administrator of ahosting system from accessing data or applications of the virtualserver, the request being sent by a client device. The computerimplemented method also includes adding, by the host manager, a guestserver to the hosting system, the guest server including thepredetermined set of hardware components. The computer implementedmethod also includes deploying, by the host manager, a preconfiguredhypervisor on the guest server, where the preconfigured hypervisor isdeployed in an immutable mode that disables changes to security settingsof the preconfigured hypervisor. The computer implemented method alsoincludes deploying, by the preconfigured hypervisor, a preconfiguredboot image as an instance of the virtual server on the preconfiguredhypervisor. The computer implemented method also includes sending, bythe host manager, an identifier of the virtual server for receipt by theclient device.

According to another embodiment, a system for extending shroudingcapability of a virtual server hosting system, includes a servercomputer and a host manager console. The host manager console receives arequest to deploy a shrouded virtual server using a predetermined set ofhardware components, and using a shrouded mode, the shrouded modepreventing an administrator of a hosting system from accessing data orapplications of the virtual server, the request being sent by a clientdevice. The host manager console also adds a guest server to the hostingsystem, the guest server including the predetermined set of hardwarecomponents. The host manager console also deploys a preconfiguredhypervisor on the guest server, where the preconfigured hypervisor isdeployed in an immutable mode that disables changes to security settingsof the preconfigured hypervisor. The host manager console also deploys,via the preconfigured hypervisor, a preconfigured boot image as aninstance of the virtual server on the preconfigured hypervisor. The hostmanager console also sends an identifier of the virtual server forreceipt by the client device.

According to another embodiment, a computer program product forextending shrouding capability of a virtual server hosting systemincludes a computer readable storage medium. The computer readablestorage medium includes computer executable instructions to receive arequest to deploy a shrouded virtual server using a predetermined set ofhardware components, and using a shrouded mode, the shrouded modepreventing an administrator of a hosting system from accessing data orapplications of the virtual server, the request being sent by a clientdevice. The computer readable storage medium also includes computerexecutable instructions to add a guest server to the hosting system, theguest server including the predetermined set of hardware components. Thecomputer readable storage medium also includes computer executableinstructions to deploy a preconfigured hypervisor on the guest server,where the preconfigured hypervisor is deployed in an immutable mode thatdisables changes to security settings of the preconfigured hypervisor.The computer readable storage medium also includes computer executableinstructions to deploy, via the preconfigured hypervisor, apreconfigured boot image as an instance of the virtual server on thepreconfigured hypervisor. The computer readable storage medium alsoincludes computer executable instructions to send an identifier of thevirtual server for receipt by the client device.

BRIEF DESCRIPTION OF THE DRAWINGS

The examples described throughout the present document may be betterunderstood with reference to the following drawings and description. Thecomponents in the figures are not necessarily to scale. Moreover, in thefigures, like-referenced numerals designate corresponding partsthroughout the different views.

FIG. 1 illustrates an example system for hosting system, in accordancewith an embodiment.

FIG. 2 illustrates an example block diagram of a hosting system, inaccordance with an embodiment.

FIG. 3 illustrates a flowchart of example logic to validate orauthenticate features of a hosting system in accordance with anembodiment.

FIG. 4 illustrates an example data flow of a public certificate and aprivate key, in accordance with an embodiment.

FIG. 5 illustrates a flowchart of example logic to pre-install a publiccertificate and a private key in a hosting system, in accordance with anembodiment.

FIG. 6 illustrates features of a hosting system, in accordance with anembodiment.

FIG. 7 illustrates components of a hosting system, in accordance with anembodiment.

FIG. 8 illustrates a flowchart for extending shrouding capability of ahosting system, in accordance with an embodiment.

FIG. 9 illustrates a hosting system with extended shrouding capability,in accordance with an embodiment.

FIG. 10 illustrates a hosting system that provides an end-to-end securevirtual server, in accordance with an embodiment.

FIG. 11 illustrates a hosting system with end-to-end security, inaccordance with an embodiment.

FIG. 12 illustrates a flowchart of example logic to implement a hostingsystem with end-to-end security, in accordance with an embodiment.

DETAILED DESCRIPTION

Authenticating Features of a Virtual Server Hosting System

Disclosed here are technical solutions for authenticating features of ahosting system that hosts a virtual server that a client requested. Forexample, the technical solutions authenticate to the client that thevirtual server has been deployed on a platform that providescharacteristics, or features, or services that the client is paying for.For example, a specific platform type (such as z System, Power, Intel,or any other) or other value add features that provide, security,performance or other features that the client has contracted to pay foris authenticated. The technical solutions thus facilitate the client tohost the virtual server that may include valuable assets in a publiccloud, assured that the virtual server meets the demands according tothe client's preferences, and not just solely based on the word of thecloud provider. For example, the client may demand that the cloudprovider, such as administrators or other employees of the cloudprovider, do not have access to the virtual server, programs running onthe server, or the data that the virtual server contains. Alternativelyor in addition, the technical solutions further facilitate the client todeploy a boot image on the cloud provider server in a way that assuresthe client that the cloud provider cannot tamper with it, and allow theclient to boot from the boot image.

FIG. 1 illustrates an example hosting system 10. The hosting system 10is in communication with one or more client devices 20A-20C via anetwork 165. The hosting system 10 is a datacenter of a cloud-computingprovider. The hosting system 10 executes a hypervisor 12, whichfacilitates deploying one or more virtual servers 15A-15N. For example,the hosting system 10 facilitates a client device 20A to deploy one ormore of the virtual servers 15A-15N. The virtual servers 15A-15N may bedeployed in response to respective requests from distinct clients20A-20C. For example, the virtual server 15A may be deployed by theclient device 20A, the virtual server 15B may be deployed by the clientdevice 20B, and the virtual server 15C may be deployed by the clientdevice 20C. The hosting system 10 may provide several features to theclient(s), such as facilitating a client to provision a virtual serverand sharing the virtual server with another virtual machine, which maybe provisioned by the same or a different client. The hosting system 10may also facilitate a client to provision a physical server (withoutrunning as a virtual machine). The examples described herein embody theprovisioning of resources in the hosting system 10 as part of a ‘virtualserver,’ however, the technical solutions described can be applied toprovision the resources as part of a physical server.

In an example, the client devices 20A-20C may belong to the same entity,such as a person, a business, a government agency, a department within acompany, or any other entity, and the hosting system 10 may be operatedas a private cloud of the entity. In this case, the hosting system 10solely hosts virtual servers 15A-15N that are deployed by the clientdevices 20A-20C that belong to the entity. In another example, theclient devices 20A-20C may belong to distinct entities. For example, afirst entity may own the client device 20A, while a second entity mayown the client device 20B. In this case, the hosting system 10 may beoperated as a public cloud that hosts virtual servers from differententities. For example, the virtual servers 15A-15N may be deployed in ashrouded manner in which the virtual server 15A does not facilitateaccess to the virtual server 15B. For example, the hosting system 10 mayshroud the virtual servers 15A-15N using an IBM z System ProcessorResource/Systems Manager (PR/SM™) Logical Partition (LPAR) feature. Thefeatures, such as the PR/SM LPAR provides isolation between partitions,thus facilitating the hosting system 10 to deploy two or more virtualservers 15A-15N for different entities on the same physical hostingsystem 10 in different logical partitions.

A client device 20A from the client devices 20A-20C is a communicationapparatus such as a computer, a smartphone, a tablet computer, a desktopcomputer, a laptop computer, a server computer, or any othercommunication apparatus that requests deployment of a virtual server bythe hypervisor 12 of the hosting system 10. The client device 20A maysend a request for receipt by the hypervisor via the network 165. Avirtual server 15A, from the virtual servers 15A-15N is a virtualmachine image that the hypervisor 12 deploys in response to a requestfrom the client device 20A from the client devices 20A-20C. Thehypervisor 12 is a virtual machine monitor (VMM), which may be software,firmware, or hardware that creates and runs virtual machines. Thehypervisor 12 facilitates the virtual server 15A to use the hardwarecomponents of the hosting system 10 to execute programs and/or storedata. With the appropriate features and modifications the hypervisor 12may be IBM Z SYSTEM™, ORACLE VM SERVER™, CITRIX XENSERVER™, VMWARE ESX™,MICROSOFT HYPER-V™, or any other hypervisor. The hypervisor 12 may be anative hypervisor executing on the hosting system 10 directly, or ahosted hypervisor executing on another hypervisor.

FIG. 2 illustrates components of an example hosting system 10. Thehosting system 10 may be a computer, such as a server computer, adesktop computer, a tablet computer, a smartphone, or any other computerthat executes the hypervisor 12, which in turn deploys the virtualservers 15A-15N. The hosting system 10 includes components that includehardware, such as electronic circuitry. The hosting system 10 includes,among other components, a processor 105, memory 110 coupled to a memorycontroller 115, and one or more input devices 145 and/or output devices140, such as peripheral or control devices that are communicativelycoupled via a local I/O controller 135. These devices 140 and 145 mayinclude, for example, battery sensors, position sensors (altimeter 40,accelerometer 42, GPS 44), indicator/identification lights and the like.Input devices such as a conventional keyboard 150 and mouse 155 may becoupled to the I/O controller 135. The I/O controller 135 may be, forexample, one or more buses or other wired or wireless connections, asare known in the art. The I/O controller 135 may have additionalelements, which are omitted for simplicity, such as controllers, buffers(caches), drivers, repeaters, and receivers, to enable communications.

The I/O devices 140, 145 may further include devices that communicateboth inputs and outputs, for instance disk and tape storage, a networkinterface card (NIC) or modulator/demodulator (for accessing otherfiles, devices, systems, or a network), a radio frequency (RF) or othertransceiver, a telephonic interface, a bridge, a router, and the like.

The processor 105 is a hardware device for executing hardwareinstructions or software, particularly those stored in memory 110. Theprocessor 105 may be a custom made or commercially available processor,a central processing unit (CPU), an auxiliary processor among severalprocessors associated with the hosting system 10, a semiconductor basedmicroprocessor (in the form of a microchip or chip set), amacroprocessor, or other device for executing instructions. Theprocessor 105 includes a cache 170, which may include, but is notlimited to, an instruction cache to speed up executable instructionfetch, a data cache to speed up data fetch and store, and a translationlookaside buffer (TLB) used to speed up virtual-to-physical addresstranslation for both executable instructions and data. The cache 170 maybe organized as a hierarchy of more cache levels (L1, L2, and so on.).

The memory 110 may include one or combinations of volatile memoryelements (for example, random access memory, RAM, such as DRAM, SRAM,SDRAM) and nonvolatile memory elements (for example, flash memory, ROM,erasable programmable read only memory (EPROM), electronically erasableprogrammable read only memory (EEPROM), programmable read only memory(PROM), tape, compact disc read only memory (CD-ROM), disk, diskette,cartridge, cassette or the like). Moreover, the memory 110 mayincorporate electronic, magnetic, optical, or other types of storagemedia. Note that the memory 110 may have a distributed architecture,where various components are situated remote from one another but may beaccessed by the processor 105.

The instructions in memory 110 may include one or more separateprograms, each of which comprises an ordered listing of executableinstructions for implementing logical functions. In the example of FIG.2, the instructions in the memory 110 include a suitable operatingsystem (OS), which executes the hypervisor 12. The operating system maycontrol the execution of other computer programs and providesscheduling, input-output control, file and data management, memorymanagement, and communication control and related services. In anexample, such as the z System™, a manufacturer of the hosting system 10may provide the hypervisor 12. In the case of a system with a structureunlike that of z System, where the hypervisor 12 is not provided by thehardware manufacturer, the cloud computing provided may use a hypervisor12 such as from VMWARE™, or other hypervisor providers. In an example,the hypervisor 12 an administrator of the physical hosting system 10 isunable to modify the hypervisor 12, except when needed in order to applyservice provided by the manufacturer. For example, the hypervisor 12 maybe provided as part of a “Licensed Internal Code (LIC)” and/or microcodefor the hosting system 10.

Additional data, including, for example, instructions for the processor105 or other retrievable information, may be stored in storage 120,which may be a storage device such as a hard disk drive or solid statedrive. The stored instructions in memory 110 or in storage 120 mayinclude those enabling the processor to execute one or more aspects ofthe systems and methods of this disclosure.

The hosting system 10 may further include a display controller 125coupled to a user interface or display 130. In some embodiments, thedisplay 130 may be an LCD screen. In other embodiments, the display 130may include a plurality of LED status lights. In some embodiments, thehosting system 10 may further include a network interface 160 forcoupling to a network 165. The network 165 may be an IP-based networkfor communication between the hosting system 10 and an external server,client and the like via a broadband connection. In an embodiment, thenetwork 165 may be a satellite network. The network 165 transmits andreceives data between the hosting system 10 and external systems. Insome embodiments, the network 165 may be a managed IP networkadministered by a service provider. The network 165 may be implementedin a wireless fashion, for example, using wireless protocols andtechnologies, such as WiFi, WiMax, satellite, or any other. The network165 may also be a packet-switched network such as a local area network,wide area network, metropolitan area network, the Internet, or othersimilar type of network environment. The network 165 may be a fixedwireless network, a wireless local area network (LAN), a wireless widearea network (WAN) a personal area network (PAN), a virtual privatenetwork (VPN), intranet or other suitable network system and may includeequipment for receiving and transmitting signals.

The client device 20A may request the hypervisor 12 to deploy thecorresponding virtual server 15A with access to specific hardware and/orsoftware components of the hosting system 10. For example, the client20A may request that the virtual server 15A have access to apredetermined number of processors, a predetermined amount of volatilememory (such as random access memory (RAM)), a predetermined amount ofnon-volatile memory (such as storage space), or any other hardwarecomponents. Alternatively or in addition, the client device 20A mayrequest that the virtual server 15A have access to specific hardwarecomponents such as electronic circuitry identified by correspondingunique identifier. For example, the client device 20A may request thatthe virtual server 15A have access to a specific type of a processor, aco-processor, a network card, or any other chip or electronic circuitry.In an example, the client device 20A may identify the electroniccircuitry using an identifier provided by a manufacturer of theelectronic circuitry. In an example, the identifier may be used inconjunction with a version identifier. Alternatively or in addition, theclient device 20A may request that the virtual server 15A have access tospecific software components such as an operating system, anapplication, a BIOS, a boot image, or any other software component. Thesoftware components requested may include firmware and embedded programsin the hardware components of the hosting system 10. The client device20A may identify the software components requested using respectiveunique identifiers provided by developers/manufacturers of therespective software components. In an example, the identifiers may beused in conjunction with version identifiers of the software components.

In an example, the client device 20A (or the entity corresponding to theclient device 20A) may be charged a fee specific to thehardware/software component that the client device 20A requests for thevirtual server 15A. For example, the client device 20A may be charged afee of X USD for deploying the virtual server 15A on the hosting system10 equipped with sixteen processors, 64 gigabytes (GB) of RAM, and amassively parallel computing device. In another example, the clientdevice 20A may be charged a fee of Y USD for deploying the virtualserver 15A on the hosting system 10 that is equipped with fourprocessors, and 8 GB of RAM. Thus, the client device 20A may select andrequest a set of hardware specifications for deploying the virtualserver. In addition or alternatively, the client device 20A may becharged P USD for deploying the virtual server 15A on the hosting system10 that uses a first operating system, such as MICROSOFT WINDOWS™, whileQ USD for a second operating system, such as LINUX™. Alternatively or inaddition, the fee may vary based on whether the hosting system 10facilitates access to specific software component, such as a boot image,a BIOS, an encryption program, a word processing software, a spreadsheetsoftware, or any other type of software component.

Thus, the client device 20A may prefer to verify that the particularhardware/software components being charged for are being provided by thehosting system 10. For example, consider that the hosting system 10 isoperated as a public cloud and that the client device 20A is requestingdeployment of the virtual server 15A by the cloud provider that operatesthe hosting system 10 for the very first time, that is there is noexisting business relationship in this regard between the entitycorresponding to the client device 20A and the cloud provider thatoperates the hosting system 10. Of course, other examples are possiblewhere the client device 20A prefers to verify the resources being madeavailable to the virtual server 15A, such as to confirm operationalefficiency/performance of the virtual server 15A, auditing purposes, orany other such purpose.

The technical solutions described herein facilitate the client device20A to confirm that the virtual server 15A is being deployed or isalready deployed at the hosting system 10, which is a physical serverwhich has the desired features. In an example, an authority, such as acomputer manufacturer of the hosting system 10, or another third-partyverification system authenticates, or confirms the features, without theauthentication being spoofed.

FIG. 3 illustrates a flowchart of an embodiment of a method ofauthenticating the features of the hosting system 10. The method may beimplemented by the hosting system 10 in conjunction with the clientdevice 20A. The client device 20A communicates with the hypervisor 12hosting the virtual server 15A, over network 160. The client device 20Arequests a certificate from the hypervisor 12, as shown at block 305.The hypervisor 12 responds to the request by sending a publiccertificate associated with the hosting system 10 to the client device20A, as shown at block 307.

FIG. 4 illustrates an example in which the hosting system 10 includes apublic certificate 410 provided by the manufacturing system 420 of thehosting system 10. As illustrated, the manufacturing system 420 maycommunicate with a verification system 430, which in turn may beaccessed by the client device 20A. FIG. 5 illustrates creation andstorage of a public certificate 410. The manufacturing system 420 may bea server, or any other type of computer, that is controlled by amanufacturer of the hosting system 10, such as IBM™, MICROSOFT™, HP™ orany other manufacturer. The verification system 430 may be a server, orany other type of computer, controlled by a third-party independent ofthe manufacturer of the hosting system, such as VERISIGN, SYMANTEC, orany other third-party that clients of the cloud computing providertrust. In an example, the verification system 430 may be controlled bythe manufacturer 420.

Referring to FIGS. 4 and 5, the manufacturing system 420 creates acombination of a public key 412 and a private key 415 for the hostingsystem 10, as shown at block 505. The manufacturing system 420, inaddition or alternatively, generates a certification-signing request(CSR) data file 418, as shown at block 505. The manufacturing system420, in addition or alternatively, generates a unique identification forthe hosting system 10, such as based on a serial number, themanufacturer name or brand, a plant of manufacture, a model number, orany other identifier or a combination thereof, as shown at block 507.The manufacturing system 420 sends the certification request 418 to theverification system 430, as shown at block 510. In addition to or aspart of a certification request, the manufacturing system 420 sends, tothe verification system 430, the CSR data file 418, which contains thepublic key 412 and the unique identifier of the hosting system 10. Theverification system 430, in response, generates the public certificate410 corresponding to the hosting system 10, as shown at block 520. Theverification system 430, during generating the public certificate 412may verify that the certification request 418 and associated informationis received from the manufacturing system 420, for example, based on anidentifier associated with the manufacturing system 420, as shown atblock 525. For example, the verification system 430 verifies an IPaddress, a MAC address, or other unique identification of themanufacturing system 420.

In an example, the verification system 430 identifies the hardware andsoftware components that the manufacturing system 420 installs in thehosting system 10, as shown at block 527. For example, the verificationsystem 430 requests the manufacturing system 420 for a specification ofthe hosting system 10. The specification may include a list of thehardware and software components of the hosting system 10. For example,the specification may identify each component in the hosting system byrespective identification codes, such as serial numbers, versionnumbers, and other identifiers that may be provided by respectiveoriginal equipment manufacturers (OEM). The specification may furtherinclude driver version identification of the components. Theverification system 430, in an example, may determine details of therespective component in the hosting system 10 by accessing a system thatincludes detailed specification of the component, such as a websitemaintained by the OEM. The verification system 430 stores theinformation of the hosting system 10 mapped with the public certificate410 and/or the unique identification of the hosting system 10.Accordingly, the verification system 430 facilitates identifying thecomponents and specifications of the components of the hosting system10.

The verification system 430 returns the public certificate 410 to themanufacturing system 420. The public certificate 410 includes the publickey 412. The public certificate 418 may be a digitally signedcertificate bearing a seal of verification by the verification system430. The manufacturing system 420 stores the public certificate 410 intothe hosting system 10, for example in a computer readable memory withinthe hosting system 10, such that the hypervisor 12 has access to thepublic certificate 410, as shown at block 535.

The manufacturing system 420 stores the private key 415 that correspondsto the public key 412, in a tamper proof hardware component 18 of thehosting system 10, as shown at block 530. The private key 415 may bestored at any time after the private key 415 has been generated. Inanother example, the manufacturing system 420 adds the private key 412into a tamper proof hardware component 18 and subsequently adds thehardware component into the hosting system 10. For example, the tamperproof hardware component 18 may be a crypto card, that facilitates thatthe private key 415 cannot be accessed by the cloud provider withoutdestroying the tamper proof hardware component 18 before the private key415 can be read. For example, the private key 415 is stored in tamperproof hardware component and/or infrastructure firmware, such as theIBM™ PCIE CRYPTOGRAPHIC COPROCESSOR. The IBM™ PCIE CRYPTOGRAPHICCOPROCESSOR is certified by the National Institute of Standards andTechnology (NIST) and validated at FIPS PUB 140-2 security level-4.Thus, the private key 415 is stored with a higher security than thepublic certificate 410. The private key 415 is stored in such a way thatonly the hypervisor 12 is able to extract the private key 415. There areno instructions provided such that either an operating system orapplication running in the virtual server 15A can extract the privatekey 415.

In FIG. 4, the dark arrows identify an example path of the publiccertificate 410 and the private key 415.

Further yet, for additional protection, the verification system mayissue the public certificate that is valid between predetermined dates.For example, the public certificate may include a “not before” and “notafter” date, so that a public certificate that is not being accessedbetween the predetermined dates is considered invalid. The manufacturingsystem 420 may, thus, periodically send the CSR 418 to the verificationsystem 430 to obtain an updated public certificate and store the updatedpublic certificate into the hosting system 10. Additionally, themanufacturing system 420, in response to an update of the hosting system10, may update the verification system 430 and request the updatedpublic certificate corresponding to the updated hosting system 10. Forexample, the update may include a repair, such as replacing a storagedisk (such as a solid state drive, a hard disk drive, or the like), orany other hardware component of the hosting system 10. Additionally oralternatively, the update may include updating a software component,such as a driver, an operating system, an application, or the like inthe hosting system 10. The update may also include installing a newhardware/software component into the hosting system 10.

Referring back to FIG. 3, the hypervisor 12 sends the public key 410 tothe client device 20A in response to the request for a certificate fromthe client device 20A. The client device 20A authenticates validity ofthe public certificate 418 with the verification system 430, as shown atblock 310. In response to the authentication being successful, theclient device 20A further verifies the components of the hosting system10, as shown at blocks 315 and 320. If the authentication fails, theclient device 20A concludes that the client device 20A was not incommunication with the hosting system 10, and abandons futurecommunications, as shown at blocks 310 and 330.

In an example, verifying the components of the hosting system 10includes requesting the hypervisor 12 for the features of the hostingsystem, as shown at block 322. The hypervisor 12, in response, sends theclient device 20A a list of components of the hosting system 10. Forexample, the list may include hardware components of the hosting system10, such as a processor, a memory, a co-processor, a graphics processor,a network card, or any other component of the hosting system 10. Inaddition or alternatively, the list includes software components of thehosting system 10, such as an operating system, a word processingapplication, a spreadsheet application, a driver, or any other softwarecomponents of the hosting system 10. The list of components may includeadditional information of each component, such as a version number,identification, or any other information of the component. The clientdevice 20A may verify the list of features from the hypervisor 12 viathe verification system 430, as shown at block 325. In an example, thehypervisor 12 sends the list of features to the client device 20A via anencrypted communication to ensure that the information is not spoofed,as shown at block 324. The request from the client device 20A may alsobe encrypted with the public key ensuring that only the correct systemwith the corresponding key 415 can decrypt the feature request. Inaddition or alternatively, the feature request message contains a uniquerequest number, for example a timestamp such as at a 1/1000th of asecond granularity or other generated number that is unique for eachrequest. The hypervisor 12 decrypts the unique number and acknowledgesback to the client device 20A as part of the reply. Thus, based on theunique number, the system ensures that neither the cloud provider norany third party can perform a replay attack to simulate a previouslycached non real-time reply in response to the feature request from theclient device 20A. In addition, the hypervisor 12 digitally signs andencrypts the response, which contains the list of features. For example,the hypervisor encrypts the response using the client device's publickey so that only the client device 20A can decrypt the message andallowing the client to independently verify the signature as genuine byvalidating with the system's public key and certificate. For example,the verification system 430 may compare the features of the hostingsystem 10 from the hypervisor 12 with the features stored by themanufacturing system 420, as shown at block 325. If the features do notmatch, the client device 20A may be notified accordingly, which mayabandon future communications with the hosting system 10, as shown atblock 330.

Else, if the features of the hosting system 10 are verified, the clientdevice 20A establishes a secure communication channel with the hostingsystem 10, as shown at block 340. For example, the client device 20Aextracts the public key 412 from the public certificate 410, as shown atblock 342. In an example, the client device 20A generates and encrypts asession key using the public key 412, as shown at block 344. The clientdevice 20A sends the encrypted session key to the hypervisor 12. Thehypervisor 12 decrypts the session key using the private key 415, whichis stored in the tamper proof hardware component 18, as shown at block346. Since the hypervisor 12 of the hosting system 10 is the only onethat can access the private key 415, the hypervisor 12 is the only onethat can decrypt the encrypted message from the client device 20A andextract the session key. The session key may be a symmetric session key.Since the private key 415 corresponds to the public key 412, in case thepublic certificate 410 has been tampered with, the decryption of thesession identifier fails. The hypervisor 12, in response to theencrypted session identifier from the client device 20A, sends anacknowledgement to the client device 20A, the acknowledgement beingencrypted using the session key, as shown at block 348.

Upon receiving the acknowledgement, the client 20A requests thehypervisor 12 to initiate the virtual server 15A specifying hardware andsoftware components to be associated with the virtual server 15A.

In an example, the client device 20A establishes the securecommunication with the hypervisor 12, as shown at block 340, prior tovalidating the features of the hosting system 10, as shown at block 330.The client device 20A and the hypervisor 12, in such an example, use thesecure communication channel to communicate the features of the hostingsystem 10, such as by encrypting communication across the secure channelusing the session key.

Thus, based on the public certificate 410, which contains the public key412, received from the hypervisor 12, the client device 20Aauthenticates that the hypervisor 12 is indeed hosted on the hostingsystem 10. The client device 20A authenticates the hypervisor byvalidating the digital signature of the public certificate 410 using thepublic key 412 with the verification system 430. If the digitalsignature is valid and the verification system 430 is trusted, then theclient device 20A trusts that the public certificate 410 came from themanufacturer of the hypervisor 10, and proceeds to communicate with thehypervisor 12. If the digital signature does not verify, the certificateis invalid and processing ends.

Thus, the technical solutions described facilitate the client device tobe assured that the client device is indeed in communication with ahypervisor on a trusted hosting system, based on the authenticity of thepublic certificate, which includes the public key of the hypervisor,using the verification system. If the message can be decrypted using thepublic key in the certificate 410, then the client device furtherdetermines that message has been encrypted using the private key, whichonly the authorized hypervisor has access to. As additional measure ofsecurity, the client device encrypts the symmetric key using the publickey in the public certificate before sending it to the hypervisor. Sincethe hypervisor is the only one with access to the private key to decryptthe message and extract the session key, the client device can trust theencrypted message returned containing a list of functions and featuresprovided by the hypervisor.

In addition, methods such as secure sockets layer (SSL) and transportlayer security (TLS) may be used to further protect against compromisedprivate keys and their associated certificates. In the case that aprivate key has been compromised, the certificate may be revoked by theverification system and placed on a list of revoked certificates.

Thus, in an example, the technical solutions described herein facilitatea computer manufacturer to build a physical server that facilitates aclient to authenticate that a cloud provider does not have access toprograms, data, configuration or other aspects of the virtual serverthat is hosted on the physical server, which may be owned by, and/or onphysical premises of the cloud provider. For example, the client maydesire to initiate a virtual server in a shrouded manner, that is thevirtual server and its contents not being accessible by any othervirtual server in the hosting system. Additionally, the client mayprefer that the cloud provider also is able to access the virtual serveror its contents. Thus, prior to initiating the virtual server, theclient may desire to confirm that the hosting system on which thevirtual server is being initiated is capable of such a shrouded virtualserver. For example, for the hosting system to be capable of such ashrouded virtual server, the client may determine that the hostingsystem has to be equipped with predetermined hardware and softwarecomponents, such as a particular brand and version of processors,memory, operating system, or any other components. The technicalsolutions described herein facilitate the client to confirm that thevirtual server is deployed on the hosting system with the securitycharacteristics desired. The technical solutions facilitate such averification by a trusted authority, such as the computer manufacturer,or another third-party, and without a possibility of the confirmationbeing spoofed.

By using the technical solutions, the client device can be assured thatthe cloud provider has deployed a virtual server on a physical serverthat is used as hosting system, such that the cloud provider cannotaccess the client's data or programs in the virtual server.

The technical solutions further facilitate the client to authenticate(or certify) functions and/or features of the hosting system, such asthe hardware components. Further yet, the client may confirm attributesof the hosting system (for example, physical hardware such as make,model, serial number, and so on). Thus, in an example, the client, withno prior relationship with the cloud provider, may securely communicatewith a verification system, such as a third party system, or amanufacturer of a hosting system to request and obtain resources andfeatures specific to computing hardware and/or software of the hostingsystem. Thus, the technical solutions provide a secure process tovalidate the underlying hardware and/or software configuration of thehosting system. Accordingly, the technical solutions facilitate theclient to perform a remote attestation to request and authenticate thata specific server of the hosting system is commissioned for use inresponse to the server being of a machine type known to support shroudedvirtual servers and that this feature is enabled and running on theserver.

Extending Shrouding Capability of a Hosting System

For a client that stores data or deploys a virtual server on a hostingsystem provided by a cloud computing provider, protecting the physicalservers that host the data and/or the virtual server from individualsand organizations with malicious intent is a critical consideration,especially if the data is sensitive data such as intellectual property.Typically, perpetrators include hackers, competitors, governments—localand foreign, and thieves. Despite the sophisticated security techniquesand systems that have been developed over the years, computer systemsremain vulnerable to new attack strategies, which have continued to bedeveloped and deployed. Accordingly, the clients demand constantvigilance to prevent data compromise.

In addition, system and data compromise from outside the cloudprovider's boundaries is not the only concern. Company employees,especially information-technology (IT) personnel, such as administratorsor others may have broad access to the physical servers of the hostingsystem, and/or computer data and programs executing on the physicalservers, in order to do their job. An employee of the cloud provider,that owns and/or manages the hosting system, may compromise the client'sdata, and thus sensitive information. As cloud environments become morewidely used, this problem is further compounded, since a clientutilizing a 3rd party cloud provider's system would demand levels oftrust, and security from the cloud providers regarding propriety dataand programs in the cloud provider's hosting system. Yet, the client mayhave no or minimal visibility as to who can access the data on thehosting system.

The technical solutions described herein facilitate increasing clienttrust in the hosting system commissioned by the cloud provider throughdesign and technology that intrinsically impedes access to client dataand programs by anyone, but the client, including the cloud provider'sstaff and administrators. Thus, the technical solutions provideprotection for the client, especially concerned about security risksassociated with utilizing a 3rd party hosting system, by preventing ITpersonnel, such as system administrators, database administrators, orany other employees of the cloud provider, from accessing, viewing, orcopying the client's data or programs that utilize the hosting system.Further, the technical solutions extend shrouding capabilities of thehosting system facilitating the cloud provider to add new physicalservers or machines to the hosting system. The new physical servers maybe based on platforms such as x86 and POWER running Linux Guests with aKVM™ Hypervisor, which may be more open than a typical server in thehosting system. The more open platforms may be intrinsically less securethan an existing server in the hosting system, and may be added inresponse to request from the client for the particular hardware and/orsoftware components of the more open platforms.

Typically, even in a hosting system that facilitates shrouded virtualservers to the client, the hosting system may use a hierarchicalstructure. The hierarchical structure may be a pyramid of employeesarranged according to access rights. Typically, an employee above apredetermined level in the hierarchy, such as a “master administrator”at the top of the hierarchy pyramid has access to change securitysettings of the virtual server, and thus has virtually unfettered accessto data within the virtual server, and at times, the entire hostingsystem.

In addition, if the client requests that the virtual server be deployedon an open platform based physical server, the security of the virtualserver may be further depleted. The open platforms may not bemanufactured to be part of a hosting system, and hence may be moresusceptible to data hacking attacks than a physical server that isspecifically manufactured for a hosting system environment. For example,the physical server for the hosting system may include tamper proofhardware and/or software components, such as crypto cards, encryptionschemes, that may include information to authenticate the manufacturerand other components of the physical server (for example, as describedabove.) In another example, the cloud providers may elect to use lessexpensive commodity hardware (based on industry standard servertechnology) in hosting system in an effort to reduce cost. Such industrystandard hardware and software components may facilitate the ITpersonnel of the cloud provider with broader access to data on thehosting system, compared to proprietary servers manufactured for hostingsystems.

A cloud provider employee, such as someone with nefarious intentions,may monitor signals in smaller, industry standard server hardware,compared to monitoring internal signals for proprietary servertechnologies, such as proprietary servers like z System. For example,the proprietary servers may use dense Very Large Scale Integration(VLSI) silicon chips mounted on circuit boards in dense packageconfigurations, thus making it extremely difficult, if not impossible,to monitor internal signals. Additionally, the proprietary servers, forproviding adequate cooling may use heat sinks mounted on the siliconchips as well as strong and persistent air flow or water flow that wouldbe disrupted by attempts to probe signals, resulting in damagedhardware. In addition, tamper resistant hardware that automaticallydisables itself when compromised is at times exploited to furtherimprove physical security of such proprietary servers. Cloud providersare, typically, highly motivated to protect client data since a breachmay have a negative business impact on the cloud provider. Further,disclosures that employees of the cloud provider accessing a client'sdata and programs, may negatively impact business. Accordingly,designing a hosting system so that a cloud provider employee isprohibited to circumvent the shrouding of client data and programs is animportant feature for a cloud provider, and facilitated by the technicalsolutions described herein.

The technical solutions described herein facilitates an extension of thehosting system to heterogeneous environments in which the cloud providermay add physical servers that include proprietary tamper proofcomponents in combination with physical servers which are more open, anddo not include such proprietary components. Based on the technicalsolutions, the client can securely access, activate, communicate withand utilize a shrouded virtual server in the cloud provider'sheterogeneous hosting system using a hardware manager console (HMC).Further, the client may request the cloud provider to add physicalservers with specific components, which may not include the tamper proofcomponents.

FIG. 6 is a representation of the elements that constitute an end-to-endshrouded virtual machine system. These components are segmented intothree layers. Layer-1 610 represents base technology, layer-2 620represents interfaces to the base technology, and layer-3 630 representssecurity functionality to implement robust shrouding capability. Thetechnical solutions describe a hosting system that implements theelements in a structure so that the client alone can access, activate,communicate with, and utilize shrouded virtual server in the hostingsystem. Of course, in other examples, features of the hosting system maybe categorized differently than what is illustrated. The elementsillustrated may be hardware elements, such as electronic circuits, fieldprogrammable gate arrays (FPGAs), application specific integratedcircuits (ASICs), or a combination thereof.

Features that are categorized in layer-1 610 facilitate isolating (thatis shrouding) one virtual server hosted in the hosting system fromanother. In an example, the features that are part of layer-3 630 mayleverage the features of layer-1 610 to harden the hosting system. Thefeatures of layer-1 may include tamper respondent hardware 611 used tohouse and protect a private shrouding keys that can only be accessed inshrouding mode. The features of layer-1 610 may also include strongseparation 612 of the virtual servers hosted on the hosting system, toprevent a client from utilizing a first virtual server on the hostingsystem as a gateway to hack into another client's virtual server on thehosting system. For example, IBM™ z System Level-1 LPAR provides suchshrouding/isolation between virtual servers.

The layer-1 610 facilitates communication of the physical servers in thehosting system with the HMC of the hosting system via HMC interfaces615. The HMC interfaces, in an example, may facilitate minimalprogrammatic access to client data. The layer-1 610 features furtherinclude encryption schemes 616, such as DM-Crypt for encrypting data ofthe virtual servers in the hosting system, including on guest physicalservers. Thus, any data resident at the cloud provider facilities may beencrypted. The layer-1 610 features may further include Trusted PlatformModules (TPM) 614 for validation of firmware and code to detecttampering. Layer-1 610 features may further facilitate securecommunication 617 such as for public/private key encryption, SSL/TLS anddigital signatures/authentication or variations of such technologies.The layer-1 further includes functionality to provide and receiveauthentication certificates 618, such as those described above. Theauthentication certificates may be from the manufacturers of respectivephysical servers and/or from third party verification systems.

The technical solutions described modify the HMC interfaces 615, whichmay facilitate programmatic interfaces that provide a systemadministrator with access to client data. In addition, a secure firmwaredeployment 613, facilitates the HMC 710 to further secure the hostingsystem by deploying preconfigured hypervisor and/or boot-images asdescribed further. As illustrated in layer-2 620, enhanced HMCinterfaces 622 modify the HMC interfaces 615 to prevent access to clientdata. The enhanced HMC interfaces 622, in an example, facilitate thephysical server to provide the system administrator no programmaticaccess to the client data.

Thus, the technical solutions facilitate the physical server to maintainthe client's data and programs hidden from the cloud provider'semployees and other users in a live application environment. The clienthas full access to the running virtual server to execute applicationsand process data. For example, the enhanced HMC interfaces 622facilitate encryption of the client data and programs stored on harddrive or solid-state drives or any nonvolatile storage external to RAMassociated with the shrouded virtual server to prevent access by cloudprovider personnel. For example, the hard drives that contain any systemdumps, logs, or trace files created by the client's applications oroperating system of the virtual server, are encrypted thus facilitatingthe client to restrict access to problem determination data. Further, asdescribed herein, the encryption function and keys are hidden from allincluding the cloud provider personnel. The client may have access tothe encryption keys and functions, and in some examples may generateand/or select the keys and functions.

Layer-3 630 includes features to craft a fully shrouded system withintegrated shrouding technology. For example, the layer-3 featuresincludes shrouding features 132, which include features such as,facilitating access to a private key only if the physical server is inshrouded mode; adding of a switch that allows transitioning the physicalserver between legacy and shrouded mode; facilitating that the switchingbetween shrouded and legacy mode can only be done via IML; adding theswitch to the tamper proof hardware component; securely clearing realmemory of the physical server during an IML to prevent access of privatedata after switching to legacy mode (or switching modes); comparing hashvalue of firmware including area containing switch and comparing it to aknown hash value; and identifying tampering of data in the physicalserver by the tamper proof hardware component before determining a modeof the physical server.

The layer-3 630 features further include extending strong isolation toguest 633, a confidential boot 634, and remote attestation 635. Thestrong isolation to guest 633 facilitates the hosting system to add aguest server, which is another physical server such as using openplatform, to the hosting system and shrouding (or isolating) a virtualserver on the guest server from virtual server(s) on the existingphysical server in the hosting system. The confidential boot 634facilitates the client to securely deploy and initialize an environmentin a shrouded virtual server the client has commissioned.

In addition, the layer-3 630 features include a Secure Pre-ConfigureHypervisor and OS 136 for the guest server and an integrated encryption638 for the guest server.

FIG. 7 illustrates an example hosting system 10 with one or more guestservers added. The illustrated hosting system 10 includes a physicalserver 720, such as an IBM z System™ host. The physical server 720 maybea physical server that includes proprietary tamper proof hardwarecomponent, providing high security features. The hosting system 10further includes a HMC 710. The HMC 710 manages the addition and removalof physical servers to and from the hosting system 10. The HMC 710 mayfurther be responsible to deploy hypervisor and or operating systemimages on the physical servers in the hosting system 10. The hostingsystem 10 further includes one or more guest servers 730. A guest serverfrom the guest servers 730 may be a physical server that uses an openplatform such as a guest server-A that uses x86 hardware and a guestserver-B that uses POWER hardware. The guest servers 730 may further notinclude security provisions such as tamper proof hardware components orany other proprietary security components that are included in thephysical server 720. For example, if the physical server 720 is a zSystem, the physical server 720 may include hardware resources 722, suchas crypto cards, VLSI electronic circuitry, that is different thanhardware resources 732 of the guest servers 730. Further, the guestservers 730 may operate a different, less secure operating system thanthat on the physical server 720. For example, the physical server 720may include software components 724, such as PR/SM that facilitatesecure virtual server isolation, which may not be supported by the guestservers that may execute operating system such as LINUX™, WINDOWS™,OS/X™ or any other operating system, typically used on commodityhardware. The HMC 710, the physical server 720, and the guest servers730 may communicate with each other via private secure data network 740.In addition, the client, such as the client device 20A may communicatewith the HMC 710, the physical server 720, and the guest servers 730 viathe network 165.

FIG. 8 illustrates a flowchart of example logic for extending shroudingcapabilities of the hosting system to a guest server. The hosting system10 receives a request from the client device 20A to deploy a virtualserver 15A, as shown at block 805. The request may specify hardwareand/or software components that the virtual server 15A is to have accessto. For example, the client device 20A may request that the virtualserver 15A is to be deployed on an x86 based machine with fourprocessors, eight GB RAM, and other such hardware components.Additionally or alternatively, the request may specify that the virtualserver 15A is to be deployed with LINUX™ version-Y as the operatingsystem, where version-Y identifies a specific variation of the operatingsystem. Of course, other examples may specify other hardware and/orsoftware components than described herein. Additionally oralternatively, the client device 20A may specify that the virtual server15A is to be deployed using the existing physical server 720 in thehosting system 10. The HMC 710 may determine if the hosting system 10includes hardware and/or software configuration, such as the physicalserver 720, that satisfies the specifications of the request from theclient device, as shown at block 810. If the existing physical server720 does not match the specifications of the request, the HMC 710 adds aguest server to the hosting system 10, as shown at block 815. The guestserver added includes that hardware components that the client device20A requests.

The HMC 710 deploys a preconfigured hypervisor to the guest server, asshown at block 820. The pre-configuration inhibits programmatic accessto the client data in the virtual server 15A via the hypervisor. Forexample, the HMC 710 may configure the hypervisor to be immutable sothat a system administrator is unable to alter security settings of thehypervisor and/or the virtual server 15A, as shown at block 822. Forexample, the HMC 710 may configure the hypervisor for integrated dataencryption, as shown at block 824. For example, the hypervisor encryptsall data that is stored within the virtual server 15A. For example, ifan application running in the virtual server 15A saves a file, the datain the file being saved is first encrypted by the hypervisor. In anexample, the hypervisor encrypts the data in the virtual server 15A byinstructing the virtual server 15A to encrypt the data according to apredetermined encryption scheme. Further, as part of the integratedencryption, the hypervisor encrypts paging data of the virtual server15A. For example, if the virtual server 15A uses virtual memorytechniques to page data in and out of real memory, the hypervisorencrypts the data that the virtual server 15A pages out from the realmemory, thus inhibiting access by the cloud provider personnel, such asa system administrator. In an example, the hypervisor encrypts the datausing a session key received from the client device 20A. For example,the session key is received in response to the client device 20Aauthenticating the hosting system with the verification system 430. TheHMC 710 stores the session key into the hypervisor during configurationof the hypervisor, as shown at block 826. In addition or alternatively,the HMC 710 may store an encryption scheme that the client device 20Aselects into the hypervisor, which the hypervisor uses to encrypt thedata, as shown at block 826. Thus, the HMC 710 configures the hypervisorand deploys such a preconfigured hypervisor to the guest server.

The HMC 710 further instructs the hypervisor to deploy the virtualserver 15A using a preconfigured boot image, as shown at block 830. Forexample, the HMC 710 configures the boot image to encrypt the datawithin the virtual server 15A using a predetermined encryption keyand/or encryption scheme, as shown at block 832. In an example, theencryption key and/or scheme may be those generated and/or selected bythe client device 20A. Further, the HMC 710 configures the boot image todisable access to cache lines of the guest server, as shown at block834. In addition or alternatively, the HMC 710 configures the boot imageto restrict a “display and alter” feature of the guest server. Forexample, the guest server may facilitate a service personnel, such as asystem administrator to access client data in the guest server by usinga system dump that may include a system state such as after a systemfailure. The system administrator may further access the virtual servervia a removable media or using a dump machine loader. The HMC 710inhibits such data access by disabling the boot image of the virtualserver 15A to be loaded other than through partition activation.Accordingly, the HMC 710 initiates a new partition (such as logical diskpartition) on the guest server and launches the boot image in the newpartition, as shown at block 836. During the loading of the boot image,the HMC 710 may restrict the hypervisor to load a clear SCSI dump thatwas generated without any system failures and which does not contain astate of the data in the virtual server 15A during a previous execution.For example, the HMC 710 does not allow or inhibits the hypervisor fromloading a SCSI dump that contains system failure data. In addition oralternatively, the HMC 710 inhibits the hypervisor from selectingoptions, such as via an application programming interface (API) or acommand line interface (CLI), such as SNMP, CIMOM, WS API, or any otherinterface. Thus, the HMC 710 restricts the loading options of the bootimage, as shown at block 838.

By configuring the hypervisor and the boot image as described herein,the HMC 710 prevents a system administrator from programmaticallyaccessing the client data in the virtual server 15A launched on theguest server, such as one of the guest servers 730. Thus, the HMC 710extends the shrouding capability of the hosting system 10 to the guestserver, since data logs and memory dumps for a partition on the guestserver may be visible and accessible to the client who has commissionedthe virtual server 15A, but not accessible by the system administrator.This restricted access facilitates viewing of client data is limited towithin the client's shrouded virtual server image by the clientthemselves (for example, dumping into an encrypted data-set, the keyknown only to the client). Cloud provider personnel, such as the systemadministrator cannot access the log, or dump file unless the clientselects to share such information with the cloud provider.

The hosting system 10 continues to provide hypervisor logs and dumps,such as a KVM dump, to the system administrator and system servicepersonnel to trouble-shoot any system wide problems, without access tothe data in the virtual server 15A. In other words, the HMC 710facilitates the hosting system 10 to provide a memory dump but onlyincluding non-client data and programs. For example, the HMC 710configures the boot image to use a predetermined address range for thevirtual server 15A, as shown at block 839. The HMC 710 identifies to thehypervisor the address range permitted for the virtual server 15A, forexample by storing a table that includes addresses used by the one ormore virtual servers. The HMC 710, in an event of system failure in thevirtual server 15A, such as that causes shutdown or restart of thevirtual server, zeros all the data in the corresponding range at thetime the memory dump is captured by the hypervisor. The HMC 710 mayfurther compare a hash value of the address range to ensure that theaddress range is complete and has not been altered. If validation is notsuccessful, a memory dump is not made available.

As further illustrated in FIG. 8, the hosting system 10 returns, to theclient device 20A, an identifier of the virtual server 15A, such as anIP address, uniform resource locator (URL), or any other identifier thatcan be used to access the virtual server 15A, as shown at block 840.

FIG. 9 illustrates a block diagram of the hosting system 10 with theguest servers 730 added according to the technical solutions describedherein. The hosting system 10 illustrates the hosting system 10 thatincludes a secure physical server 720, that uses a secure firmware andhardware, such as the z System Firmware and Hardware to deploy virtualservers 15A-15N in shrouded mode. That is, as illustrated, each virtualserver from the virtual servers 15A-15N is isolated from each other bythe hypervisor 12 and data within the virtual servers 15A-15N is storedin respective storage disk or partition 910A-910N in a storage subsystem910 of the hosting system 10. As described herein, the HMC 710 extendsthe capability of the hosting system 10 to deploy shrouded virtualservers on more open, industry standard servers, such as the guestserver 730A. The shrouding capability of the hosting system 10 isextended by deploying preconfigured hypervisors and/or boot images forthe guest servers, which may be x86 or POWER based systems. By extendingthe shrouding capability, the guest server 730A intrinsically impedesaccess to client data and programs by anyone except the client,including the cloud provider's staff and administrators. For example,consider that the client requested a Linux KVM (Kernel-based VirtualMachine) virtual server with specific hardware and/or softwareconfiguration. The HMC 710 facilitates extending the hosting system 10with the guest server 730A which includes the requested specifications.The HMC 710 further configures a hypervisor 732, such as by renderingthe hypervisor immutable and the like, before deployment of thehypervisor 732 from the HMC 710. The HMC 710 makes additional oralternative firmware modifications and designed enhancements to theguest server 730 to harden the hypervisor 732 to impede programmaticaccess to client data and programs of a virtual server 734 on the guestserver 730. For example, the HMC 710 configures the hypervisor 732 sothat intrinsic system features cannot be changed, disabled orcircumvented by the system administrator. Alternatively or in addition,the HMC 710 incorporates a firmware structure with an API for thehypervisor 732 that the hypervisor 732 can use. The HMC 710 furtherdeploys the virtual server 734 using a preconfigured boot image thatfurther restricts the capability of the guest server 730A. In anexample, the boot image of the virtual server 734 is configured based onthe capabilities of the guest server 730A. For example, the HMC 710configures the virtual server 734 to store data, such as data related toapplications or file-system within the virtual server 734 to a separatestorage disk or partition 934 in the storage subsystem 910. The HMC 710may additionally configure the virtual server 734 and/or the hypervisor732 to encrypt the data in the storage disk or partition 934, such asusing an encryption key from the client. Additionally, the HMC 710configures the virtual server 734 to encrypt paging data to a separatestorage disk or partition 936. The paging data may be encrypted usingthe encryption key form the client. In an example, the encryption keyfor the data within the virtual server 734 may be different than theencryption key used for encrypting the paging data. In another example,the storage disk or partition 934 and 936 may be one and the same.

In another example, initialization, the HMC 710 validates the hypervisorand boot-image being deployed, such as by comparing a hash value of thehypervisor and/or the boot-image with predetermined hash value. Ofcourse, other validation techniques may be used in other examples.

Thus, the technical solutions described herein mitigate shroudingweakness and limitations associated with industry standard systems, suchas open platforms and/or commodity hardware by extending capabilities ofa hosting system, such as z System. In addition to providing theshrouding capability, the technical solutions described herein providetechniques to pre-configure and deploy a secure hypervisor and anoperating system image to dissimilar systems coupled to a hostingsystem, such as Power System (IBM POWER Servers) and System x (x86Servers) being coupled to z System servers via zBX features. Forexample, a secure enhanced Linux operating system image may bepreconfigured for deployment, as described herein.

Thus, the technical solutions described herein secure cloud servicesthat inhibit third parties, including the cloud provider themselves,from having access to client data and programs. The technical solutionssecure system initialization and deployment for heterogeneous serverarchitectures that prevent code, including firmware and hypervisor codefrom being compromised or altered. The client may communicate with thehosting system via a secure communication path. The technical solutionsalso facilitate the client to remotely validate the hosting system, andthe features supported by the hosting system, such as shrouded virtualservers. The hosting system further facilitates storage separationbetween distinct virtual servers, and further provides system hardwareand firmware that contain no programmatic access for anyone other thanthe client to access the client's virtual server, programs and data. Thehosting system further facilitates the shrouded virtual server toencrypt client data and programs from being accessed outside the virtualserver.

End-to-End Protection for Shrouded Virtual Servers

Technical solutions described herein include an end-to-end system andmethod by which the client can securely access, activate, communicatewith and utilize the shrouded virtual server in the hosting system 10.The techniques described further improves isolation features of thehosting system 10 to further secure the hosting system 10 by making thehosting system 10 an immutable system with system wide shroudingattributes. For example, the improvements further strengthen separationof the virtual servers 15A-15N running on the hosting system 10, thuspreventing data of a first virtual server being accessed via anothervirtual server on the hosting system, using the other virtual server asa gateway to hack into the first virtual server. The technical solutionsfacilitate such improved isolation between the virtual servers 15A-15Nregardless of whether the hypervisor 12 supports shrouding.

Another aspect provided by the technical solutions is to securedeployment of firmware, hypervisors, and operating systems in a shroudedmanner to inhibit external access, even by system administrators of thecloud provider. Thus, the technical solutions prevent tampering of thevirtual servers 15A-15N by parties with nefarious intent.

FIG. 10 illustrates the hosting system 10 that provides an end-to-endsecure hosting system. For example, the hosting system 10 implementingtechnical solutions described herein, such as IBM z System, and PowerSystem servers, may include the Hardware Management Console (HMC) 710.The HMC 710 facilitates addition and use of a guest server 730A asdescribed herein.

The HMC 710 in addition facilitates improving the security of the securephysical server 720. The secure physical server 720 includes the publiccertificate 410 that in turn, includes the public key 412 that amanufacturer of the physical server 720 generates. In addition, thephysical server 720 includes the tamper proof component 18 that storesthe private key 415 from the manufacturer. The HMC 710 shrouds thevirtual server 15A that has been deployed on the physical server 720similar to the shrouded virtual server 734 that is deployed on the guestserver 730A. For example, as described earlier, the HMC 710preconfigures the hypervisor 12 prior to deployment and furtherpreconfigures a boot-image of the virtual server 15A. The hypervisor 12and the boot-image of the virtual server 15A may be configured similarto those of the hypervisor 732 and the boot-image of the virtual server734, respectively.

In addition, the HMC 710 further secures the physical server 720 byimpeding a cloud provider's personnel and administrator fromprogrammatically accessing, viewing or copying data and programs fromwithin the shrouded virtual server 15A. To this end, the HMC 710 detectsand disables or removes, authorities, interfaces and other componentsthat facilitate accessing, viewing, or copying data or programs from thehosting system 10 (hardware, firmware, hypervisor, and so on). Forexample, the physical server 720, such as z System, allowsadministrators to access individual cache lines to display and alterdata from anywhere in the server. The physical server 720 may furtherfacilitate an administrator to load and access removable media. Inanother example, the physical server 720 may facilitate an administratorto boot the physical server 720 from a separate disk partition. Thetechnical solutions described herein facilitate the HMC 710 to disablesuch unauthorized access, such as by ensuring that the partition data isalways cleared before a load other than through partition activation.

In an example, the HMC 710 further secures the physical server 720 bydeploying the virtual server 15A using a secure repository ofpreconfigured hypervisors, firmware, and/or boot-images that inherentlyrestrict access to the virtual server 15A. The HMC 710, thus, hampers anattacker's ability to alter the physical server 720 by inhibitingprogrammatic access to view, copy, or alter firmware, hypervisors,and/or boot-images.

For example, the preconfigured hypervisor 12 and the boot-image of thevirtual server 15A encrypts the data of the applications within thevirtual server 15A as well as the paging data into respective storagedusk or partition of the storage subsystem 910. Accordingly,irrespective of whether the client device 20A requests a virtual server15A on the physical server 720 or the virtual server 734 on the guestserver 730A, the HMC 710 secures the corresponding host machine.

FIG. 11 illustrates the hosting system 10 implementing an end-to-endsecure virtual server. The server 1105 illustrated maybe the physicalserver 720 or the guest server 730A or a combination thereof, withcorresponding hypervisor 1107 and shrouded virtual servers 15A-15N. Thehosting system 1105 deploys a virtual server 1170 in response to arequest from the client device 20A. In an example scenario, considerthat the client device 20A is of a financial institution, such as abank. Of course, the client device 20A may belong to other type ofclient in other examples. Further, consider that an end-user device 1110uses the virtual server 1170, where the end-user is a client of theclient, which in the above example is the bank's customer.

FIG. 12 illustrates a flow chart of the hosting system 10 providing anend-to-end security for the client device 20A when requesting deploymentof and operating the shrouded virtual server 1170. The client device 20Acontacts the hosting system 10, using a secure communication 1120, suchas via SSL/TLS utilizing a public key of the server 1105. The clientdevice 20A may request for, and in response, the hosting system 10provides the client device 20A information to authenticate the hostingsystem 10, as shown at block 1205. In an example, the hosting system 10provides the public certificate 410 of the server 1105 to the clientdevice 20A, where the public certificate 410 includes the public key 412of the hosting system 10. The client device 20A verifies the identityand trustworthiness of the hosting system 10, such as by verifying adigital signature of the public certificate 410 via a verificationsystem 430. The client device 20A may authenticate the hosting system 10with the verification system 430 via a secure communication 1130. If theauthentication is not successful, the client device 20A may abandon therequest for the virtual server 1170 from the hosting system 10, as shownat blocks 1210 and 1212.

Else, if the authentication is successful, the client device 20Arequests features of the one or more physical servers of the hostingsystem 10. In an example, the client device 20A may request the hostingsystem 10 to provide specific hardware and/or software components thatthe client device 20A may desire to deploy the virtual server 1170. Inresponse, the hosting system 10 may identify the physical server 720 tothe client device 20A to deploy the virtual server 1170. The clientdevice 20A verifies whether the physical server 720 has the specifiedfeatures, as shown at block 1215. For example, the client device 20A mayverify the features of the physical server 720 using the verificationsystem 430. If the physical server 720 meets the specificationsrequested by the client device 20A, the HMC 710 uses the physical server720 as the server 1105 illustrated in FIG. 11 by proceeding to deploy apre-configured boot-image 1172 corresponding to the virtual server 1170,as shown at block 1230. Else, if the physical server 720 fails to meetthe specifications, the HMC 710 adds the guest server 730A and deploys apreconfigured hypervisor on the guest server, which is then used as theserver 1105 to deploy the virtual server 1170, as shown at blocks 1220and 1225. The HMC 710 further deploys the preconfigured boot-image 1172,as shown at block 1230. The HMC 710 provides an identifier, such as anIP address or a URL of the virtual server 1170 to the client device 20A.

The client device 20A generates a session key, such as a symmetricsession encryption key via SSL/TLS for secure communication with thevirtual server 1170 via a secure communication 1125. The HMC 710provides the virtual server 1170 a client identifier 1174. The clientidentifier 1174 may include the session key and/or any otheridentification of the client device 20A. In an example, the HMC 710configures the boot-image with the client identifier 1174 prior todeployment, as described earlier. Alternatively or in addition, the HMC710 stores the client identifier 1174 in the virtual server 1170 afterthe boot image 1172 has been deployed. For example, in case the virtualserver 1170 is deployed on the physical server 720, the HMC 710 may usea preconfigured boot-image that is stored in a repository. Since thehardware and/or software components of the physical server 720 arepreviously known, the HMC 710 maintains a repository of preconfiguredboot-images that impede administrator access of virtual servers deployedon the physical server 720. In such cases, the HMC 710 stores the clientidentifier 1174 after the virtual server 1170 has been deployed.

The virtual server 1170 uses the client identifier 1174 to authenticatecommunication it receives, to verify that a securely communication 1125with the client device 20A ensues, as shown at block 1235. For example,the client device 20A encrypts communication messages for the virtualserver 1170 using the session key that may be part of the clientidentifier 1174. Further, in response, the virtual server 1170 encryptsthe communication messages for the client device 20A using the sessionkey.

The session key may be the symmetric key that was provided during theinitial SSL/TLS session or an additional new symmetric session key maybe generated via a new SSL/TLS session to ensure the cloud provideradministrator has no knowledge of the session key used for encryptingthe communication messages. In an example, the virtual server 1170 isenabled after a first communication from the client device 20A isvalidated according to the client identifier 1174. If the authenticationof the communication from the client device 20A fails, the virtualserver 1170 communicates to the client device 20A or any other contactinformation of the client that a possible attack has been detected, asshown at blocks 1240 and 1245. Else, the virtual server 1170 proceeds torespond to the communication from the client device 20A by performingoperations as requested by the communication, as shown at block 1250.

Thus, the hosting system 10 provides the client device 20A thatcommissioned the shrouded virtual server 1170 from the cloud provider, asecure communication 1125 by which to communicate with the shroudedvirtual server in a way that communication is hidden from a cloudprovider administrator 1190. Further, the client device 20A may providethe identifier of the virtual server 1170 to the end-user device 1110via a secure communication 1140. The client device 20A may furtherprovide the end-user device the symmetric key to use for communicationwith the virtual server 1170. Accordingly, the end-user device 1110 mayinitiate communication with the virtual server 1170 via a securecommunication 1150. In another example, the client device 20A generatesa separate session key for each end-user device 1110 and sends theseparate session keys to the virtual server 1170 for identifying therespective end-user devices.

Thus, the technical solutions described herein provide an end-to-endsecure system to deploy and use a virtual server from an authenticatedhosting system. The HMC configures the virtual server on a physicalserver and deploys a hypervisor and/or a boot image in conjunction withvalidation based on predetermined hash values to ensure that thedeployed hypervisor and/or boot image has not been compromised. Thetechnical solutions further include remote attestation, for a clientdevice to securely contact and communicate the hosting system tocommission (that is, request) cloud resources such as to deploy thevirtual server with specific security feature and characteristics (forexample, supporting shrouded virtual server).

The hosting system further facilitates the client device to execute aconfidential boot of the virtual server. For example, a client devicemay request a KVM guest to download a Linux operating system,applications programs, and data in a secure shrouded manner so allprograms and data remain hidden from a system administrator. Forexample, the virtual server is provisioned with a confidential bootkernel and data/secrets to confirm the credentials of the client. Thismay be done automatically by the HMC without involvement of the systemadministrator so that the administrator does not have access topasswords or other secrets provided to/by the client. Additionally, theHMC modifies the physical machine on which the hypervisor and thevirtual server are deployed on so that there is no programmatic accessto security settings and/or data on the physical machine, by anyoneincluding the system administrator.

Thus, the shrouded virtual server is deployed on a physical machinehardened so that the system administrator cannot access, view, or copydata or programs that reside within the shrouded virtual server. Allspecialized authorities, interfaces, and other techniques that wouldallow accessing, viewing or copying data or programs are disabled,password restricted, or removed from the physical machine (hardware,firmware, hypervisor, hardware management console, and so on). Inaddition, strong separation between the virtual servers running on thehosting system is provided to prevent one virtual server being used as agateway to hack into another virtual server.

Further, the hosting system hides the client's data and programs fromthe system administrator and other users in a live applicationenvironment, maintaining full access by the client device thatcommissioned the virtual server. For example, all client data andprograms stored on the storage subsystem in the hosting system, whichmay include hard disk drives, solid state drives, or any other suchnonvolatile storage, is encrypted to prevent access by cloudadministrator. The HMC 710 may further configure the virtual server toencrypt the storage drives that contain system dumps, logs, or tracefiles created by the applications or operating system of the virtualserver, thus facilitating the client device to restrict who has accessto problem determination data.

In addition, or alternatively, the hosting system provides that clientdata and programs stored outside the client's KVM guest partition on thestorage subsystem of the hosting system is encrypted. The encryption maybe performed using the operating system of the virtual server, or thehypervisor, such as a Linux encryption function, such as Dm-crypt. Inanother example, the client device supplies the encryption key to beused for encrypting the data on the storage subsystem to further securethe data from the system administrator. In yet another example, theclient device provides both, the encryption scheme and keys forencrypting the data.

In yet another example, the HMC uses integrated encryption contained inthe physical machine's firmware and hardware in an automatic manner toenhance security of the data. Thus, the client device would not have toenable the encryption in their environment for shrouding to beeffective. Further, this would eliminate communicating the encryptionkeys back and forth between the client device and the hosting system,and thus be hidden from the system administrator.

The client device may initiate communication with the shrouded virtualserver utilizing a secure communication such as SSL/TLS. For example,the client device may use symmetric session keys and establish anSSL/TLS session to communicate with the virtual server. The clientdevice may use the symmetric key that was created during the initialsession between the client device and the hosting system whencommissioning the virtual server, and which may be provided to the bootimage of the virtual server for later use. In another example, a secondSSL/TLS session may be initiated between the client device and thevirtual server to create a new key.

In another example, a tamper resistant hardware in the physical serveris used to hold a private key which is used to enable securecommunication between the client device and the physical machine. Thesymmetric session key used to encrypt/decrypt data between the clientdevice and the shrouded virtual server is generated by the SSL/TLSsession using this private key accessed directly by the hypervisor andstored in the tamper resistant hardware, so that only the shroudedvirtual server and not the system administrator has access to thisprivate key.

The HMC further secures the physical machine that deploys the virtualserver by preconfiguring the hypervisor and/or boot image of the virtualserver to disable programmatic access to hardware/software components ofthe physical machine. For example, the functionalities disabled mayinclude capabilities such as: “display and alter” that provide systemadministrators or service personnel from having access to client datavia memory bus and/or cache lines. Other such capabilities that areneutered include disabling access to removable media, disabling accessto dump machine loader data, and disabling booting other than throughpartition activation. By restricting booting only through partitionactivation, the HMC ensures that ensure that partition data is clearedbefore a load. The HMC may further only allow a load clear or SCSI loadbut restrict load normal or SCSI dump. For example, the HMC restrictsactivation profile options (UI and APIs) to prevent any loads without aclear before the load.

The HMC further configures the hypervisor and/or virtual server to haveintegrated encryption for any paging functions in and out of memoryspace initiated by the hypervisor. An encryption key known only to thefirmware and not accessible nor visible to anyone including the systemadministrator may be used, such as the session key from the clientdevice.

Logging and memory dumps for any guest partition will visible andaccessible to the client device that has commissioned the virtual serverbut is not accessible by the system administrator. This restrictedaccess ensures viewing of client data is limited within the shroudedvirtual server image by the client (for example, dumping into anencrypted data-set, the key known only to the client). Thus, systemadministrator does not have access to the logs unless the client choosesto share information with the system administrator. In an example, theHMC may provide KVM hypervisor logs and dumps that are accessible by thesystem administrator and system service personnel to trouble shootsystem wide problems. For example, the HMC facilitates a memory dumpcapability but only non-client data and programs are visible. In anotherexample, the HMC configures the hypervisor to maintain tables thatinclude address ranges used by virtual servers and zeroes data in thoseranges in case of system failure. The address ranges may bepredetermined and the hypervisor may checked the address ranges such asusing a hashing function to ensure they are complete and have not beenaltered. If validation is not successful, no memory dump is madeavailable.

Thus, the technical solutions describe an end-to-end system forproviding secure cloud services that inhibits third parties, includingthe cloud provider themselves, from having access to client data andprograms. The technical solutions prevent code, including firmware andhypervisor code, from being compromised or altered and establish asecure communication path between client and cloud provider system. Theclient may remotely validate that the system supports shrouded virtualserver with storage separation between distinct virtual servers. Theclient may further validate that the system hardware and firmware hasbeen configured to impede programmatic access by anyone other than theclient to the virtual server, programs and data. The system subsequentlydeploys a shrouded virtual server utilizing encryption to prevent clientdata and programs from being accessed outside the virtual server. Thesystem further notes identification from the client device toauthenticate communications from the client device or an end-user devicethat has been authorized by the client device.

The present invention may be a system, a method, and/or a computerprogram product at any possible technical detail level of integration.The computer program product may include a computer readable storagemedium (or media) having computer readable program instructions thereonfor causing a processor to carry out aspects of the present invention.

The computer readable storage medium can be a tangible device that canretain and store instructions for use by an instruction executiondevice. The computer readable storage medium may be, for example, but isnot limited to, an electronic storage device, a magnetic storage device,an optical storage device, an electromagnetic storage device, asemiconductor storage device, or any suitable combination of theforegoing. A non-exhaustive list of more specific examples of thecomputer readable storage medium includes the following: a portablecomputer diskette, a hard disk, a random access memory (RAM), aread-only memory (ROM), an erasable programmable read-only memory (EPROMor Flash memory), a static random access memory (SRAM), a portablecompact disc read-only memory (CD-ROM), a digital versatile disk (DVD),a memory stick, a floppy disk, a mechanically encoded device such aspunch-cards or raised structures in a groove having instructionsrecorded thereon, and any suitable combination of the foregoing. Acomputer readable storage medium, as used herein, is not to be construedas being transitory signals per se, such as radio waves or other freelypropagating electromagnetic waves, electromagnetic waves propagatingthrough a waveguide or other transmission media (e.g., light pulsespassing through a fiber-optic cable), or electrical signals transmittedthrough a wire.

Computer readable program instructions described herein can bedownloaded to respective computing/processing devices from a computerreadable storage medium or to an external computer or external storagedevice via a network, for example, the Internet, a local area network, awide area network and/or a wireless network. The network may comprisecopper transmission cables, optical transmission fibers, wirelesstransmission, routers, firewalls, switches, gateway computers and/oredge servers. A network adapter card or network interface in eachcomputing/processing device receives computer readable programinstructions from the network and forwards the computer readable programinstructions for storage in a computer readable storage medium withinthe respective computing/processing device.

Computer readable program instructions for carrying out operations ofthe present invention may be assembler instructions,instruction-set-architecture (ISA) instructions, machine instructions,machine dependent instructions, microcode, firmware instructions,state-setting data, configuration data for integrated circuitry, oreither source code or object code written in any combination of one ormore programming languages, including an object oriented programminglanguage such as Smalltalk, C++, or the like, and procedural programminglanguages, such as the “C” programming language or similar programminglanguages. The computer readable program instructions may executeentirely on the user's computer, partly on the user's computer, as astand-alone software package, partly on the user's computer and partlyon a remote computer or entirely on the remote computer or server. Inthe latter scenario, the remote computer may be connected to the user'scomputer through any type of network, including a local area network(LAN) or a wide area network (WAN), or the connection may be made to anexternal computer (for example, through the Internet using an InternetService Provider). In some embodiments, electronic circuitry including,for example, programmable logic circuitry, field-programmable gatearrays (FPGA), or programmable logic arrays (PLA) may execute thecomputer readable program instructions by utilizing state information ofthe computer readable program instructions to personalize the electroniccircuitry, in order to perform aspects of the present invention.

Aspects of the present invention are described herein with reference toflowchart illustrations and/or block diagrams of methods, apparatus(systems), and computer program products according to embodiments of theinvention. It will be understood that each block of the flowchartillustrations and/or block diagrams, and combinations of blocks in theflowchart illustrations and/or block diagrams, can be implemented bycomputer readable program instructions.

These computer readable program instructions may be provided to aprocessor of a general purpose computer, special purpose computer, orother programmable data processing apparatus to produce a machine, suchthat the instructions, which execute via the processor of the computeror other programmable data processing apparatus, create means forimplementing the functions/acts specified in the flowchart and/or blockdiagram block or blocks. These computer readable program instructionsmay also be stored in a computer readable storage medium that can directa computer, a programmable data processing apparatus, and/or otherdevices to function in a particular manner, such that the computerreadable storage medium having instructions stored therein comprises anarticle of manufacture including instructions which implement aspects ofthe function/act specified in the flowchart and/or block diagram blockor blocks.

The computer readable program instructions may also be loaded onto acomputer, other programmable data processing apparatus, or other deviceto cause a series of operational steps to be performed on the computer,other programmable apparatus or other device to produce a computerimplemented process, such that the instructions which execute on thecomputer, other programmable apparatus, or other device implement thefunctions/acts specified in the flowchart and/or block diagram block orblocks.

The flowchart and block diagrams in the Figures illustrate thearchitecture, functionality, and operation of possible implementationsof systems, methods, and computer program products according to variousembodiments of the present invention. In this regard, each block in theflowchart or block diagrams may represent a module, segment, or portionof instructions, which comprises one or more executable instructions forimplementing the specified logical function(s). In some alternativeimplementations, the functions noted in the blocks may occur out of theorder noted in the Figures. For example, two blocks shown in successionmay, in fact, be executed substantially concurrently, or the blocks maysometimes be executed in the reverse order, depending upon thefunctionality involved. It will also be noted that each block of theblock diagrams and/or flowchart illustration, and combinations of blocksin the block diagrams and/or flowchart illustration, can be implementedby special purpose hardware-based systems that perform the specifiedfunctions or acts or carry out combinations of special purpose hardwareand computer instructions.

The descriptions of the various embodiments of the present inventionhave been presented for purposes of illustration, but are not intendedto be exhaustive or limited to the embodiments disclosed. Manymodifications and variations will be apparent to those of ordinary skillin the art without departing from the scope and spirit of the describedembodiments. The terminology used herein was chosen to best explain theprinciples of the embodiments, the practical application, or technicalimprovement over technologies found in the marketplace, or to enableothers of ordinary skill in the art to understand the embodimentsdisclosed herein.

What is claimed is:
 1. A system for extending shrouding capability of avirtual server hosting system, the system comprising: a server computer;and a host manager console configured to: receive a request to deploy ashrouded virtual server using a predetermined set of hardwarecomponents, and using a shrouded mode, the shrouded mode preventing anadministrator of a hosting system from accessing data or applications ofthe virtual server, the request being sent by a client device; add aguest server to the hosting system, the guest server comprising thepredetermined set of hardware components; deploy a preconfiguredhypervisor on the guest server, wherein the preconfigured hypervisor isdeployed in an immutable mode that disables changes to security settingsof the preconfigured hypervisor; deploy, via the preconfiguredhypervisor, a preconfigured boot image as an instance of the virtualserver on the preconfigured hypervisor by initiating a new diskpartition on the guest server and deploying the preconfigured boot imageon the new disk partition and restricting the preconfigured hypervisorto loading a clear memory dump that was generated without a systemfailure; and send an identifier of the virtual server for receipt by theclient device.
 2. The system of claim 1, wherein the host managerconsole is further configured to determine that a server in the hostingsystem has different hardware components from the predetermined set ofhardware components, and add the guest server in response.
 3. The systemof claim 1, wherein the host manager console configures the virtualserver to encrypt the data in the virtual server using a session keyreceived from the client device.
 4. The system of claim 1, wherein thehost manager console configures the virtual server to encrypt pagingdata using a session key received from the client device.
 5. The systemof claim 1, wherein the host manager console configures the virtualserver to disable access to cache lines of the guest server.
 6. Thesystem of claim 1, wherein the host manager console is furtherconfigured to, prior to deployment of the preconfigured hypervisor onthe guest server, determine authenticity of the preconfigured hypervisorby comparing a hash value of the preconfigured hypervisor with apredetermined value.
 7. The system of claim 1, wherein the new diskpartition is a logical disk partition.
 8. The system of claim 1, whereinthe clear memory dump further does not contain a state of from aprevious execution of the shrouded virtual server.
 9. A computer programproduct for extending shrouding capability of a virtual server hostingsystem, the computer program product comprising a computer readablestorage device, the computer readable storage device comprising computerexecutable instructions, wherein the computer readable storage devicecomprises instructions to: receive a request to deploy a shroudedvirtual server using a predetermined set of hardware components, andusing a shrouded mode, the shrouded mode preventing an administrator ofa hosting system from accessing data or applications of the virtualserver, the request being sent by a client device; add a guest server tothe hosting system, the guest server comprising the predetermined set ofhardware components; deploy a preconfigured hypervisor on the guestserver, wherein the preconfigured hypervisor is deployed in an immutablemode that disables changes to security settings of the preconfiguredhypervisor; deploy, via the preconfigured hypervisor, a preconfiguredboot image as an instance of the virtual server on the preconfiguredhypervisor by initiating a new disk partition on the guest server anddeploying the preconfigured boot image on the new disk partition andrestricting the preconfigured hypervisor to loading a clear memory dumpthat was generated without a system failure; and send an identifier ofthe virtual server for receipt by the client device.
 10. The computerprogram product of claim 9, wherein the computer readable storage devicefurther comprises instructions to determine that a server in the hostingsystem has different hardware components from the predetermined set ofhardware components, and add the guest server in response.
 11. Thecomputer program product of claim 9, wherein the computer readablestorage device further comprises instructions to configure the virtualserver to encrypt the data in the virtual server using a session keyreceived from the client device.
 12. The computer program product ofclaim 9, wherein the computer readable storage device further comprisesinstructions to configure the virtual server to encrypt paging datausing a session key received from the client device.
 13. The computerprogram product of claim 9, wherein the computer readable storage devicefurther comprises instructions to, prior to deployment of thepreconfigured hypervisor on the guest server, determine authenticity ofthe preconfigured hypervisor by comparing a hash value of thepreconfigured hypervisor with a predetermined value.
 14. The computerprogram product of claim 9, wherein the new disk partition is a logicaldisk partition.
 15. The computer program product of claim 9, wherein theclear memory dump further does not contain a state of from a previousexecution of the shrouded virtual server.